With newer versions of Crossover (e.g., Version 11), SP2 installs fine.
The problems reported in earlier postings to this forum have been resolved.
Also note that because Office service packs are cumulative,
you do not have to install Service Pack 1 before you install Service Pack 2.
Service Pack 2 includes all of the fixes that were included in Service Pack 1.
http://support.microsoft.com/kb/953195